Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'sastob' = 'rundll32.exe "%APPDATA%\sastob.dll",MakeKey'
Malicious functions:
Executes the following:
- '<SYSTEM32>\rundll32.exe' "%APPDATA%\sastob.dll",MakeKey
Modifies file system :
Creates the following files:
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\fid=BwCRAAEAK3YDAAEFCBcAAAAAAAAAAAAAAAAAAABjDQIICwAAAAjUe7LiEdZyrLhzgiZvmW_JehZRAABVVVVVVVVVVVVVVVVVVVVVoXPOAbiwepYrdgMAVlRRXF5TQlh_Z3d0a2d4anoGAQK-kSInYZ[1]
- %APPDATA%\nsbasc.dll
- %APPDATA%\sastob.dll
Deletes itself.
Network activity:
Connects to:
- '11#####.##n99.fileshostingetc.com':80
TCP:
HTTP GET requests:
- 11#####.##n99.fileshostingetc.com/upload/fid=BwCRAAEAK3YDAAEFCBcAAAAAAAAAAAAAAAAAAABjDQIICwAAAAjUe7LiEdZyrLhzgiZvmW_JehZRAABVVVVVVVVVVVVVVVVVVVVVoXPOAbiwepYrdgMAVlRRXF5TQlh_Z3d0a2d4anoGAQK-kSInYZO9YAAAAAAAAQcAAAAHAAAANFYA
UDP:
- DNS ASK 11#####.##n99.fileshostingetc.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: '' WindowName: '(null)'
